Takafumi Fukuyama, Hirofumi Ueda, Noriaki Nishiyama, Masato Tanaka, Fujio Ohnishi, Juha Saunavaara, Yuko Shirai, Taro Mori, Tomoa Kato, Shuhei Takahashi and Shuwa Honda. Fundamental Analysis of Significant Issues Regarding Development of “Arctic Toursim. Proceedings of the 35th International Symposium on the Okhotsk Sea & Polar Oceans 2020, 147-148. (2020/2/16)
http://hdl.handle.net/2115/77356